Thermostatic circuit-closer.



J. G. MOE'SSNER.

THERMOSTATIC CIRCUIT CLOSER.

APPLIOATION FILED APR. 19, 1913.

1,104,695. Patented July 21, 1914.

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JOHN C. MOESSNER, OF MOUNT PLEASANT, SOUTH CAROLINA.

THERMOSTA'IIC CIRCUIT-CLOSER.

Specification of Letters Patent.

Patented July 21, 1914.

Application filed April 19, 1913. Serial No. 762,2tl3.

To all whom it may concern:

Be it known that I, JOHN C. MonssNnR, a citizen of the United States, residing at Mount Pleasant, in the county of Charleston and State of South Carolina, have invented new and useful Improvements in Thermostatic Circuit-Closers, of which the following is a specification.

This invention relates to improvements in circuit closers and has particular application to thermostatic circuit closers.

In carrying out the present invention, it is my purpose to provide a device of the class described by means of which an alarm or other analogous electric circuit may be normally held open and whereby such circuit will be automatically closed when the temperature of the atmosphere surrounding the circuit closer has risen to the predetermined point.

It is also my purpose to provide a thermostatically controlled circuit closer wherein, after the circuit closer has been actuated to close the circuit controlled thereby, incident to a rising temperature, the parts may be readily restored to inactive position so that the previously destroyed fusible or thermostatic element may be replaced and the device again placed in condition for operation.

Furthermore, I aim to provide a device of the class described which will embrace the desired features of simplicity, efliciency and durability and which may be manufactured, marketed and installed at a minimum eX- pense, the construction and arrangement of the parts being such as to reduce the possibility of derangement to a minimum.

With the above and other objects in view, the invention consists in the construction, combination and arrangement of parts hereinafter set forth in and falling Within the scope of the claim.

In the accompanying drawing, Figure 1 is a front elevation of a circuit closer eon structed in accordance with my present invention. Fig. 2 is a transverse sectional view through the same, and Fig. 3 is a front elevation thereof, the cover being removed and the mechanism being shown in circuit closing position.

Referring now to the accompanying drawing in detail, the numeral 1 designates a casing constructed of any suitable material and of any preferred shape and provided with a cover 2 detachably connected thereto as by screws 3. This casing houses the mechanism of the circuit closer which, in the present instance, embraces an arbor 4t journaled in a frame composed of plates 5 and 6 suitably spaced apart and fastened in any suitable manner to the end wall of the casing, one end of the arbor projecting outwardly through the cover 2. The plates 5 and 6 are preferably, although not necessarily, in the form of strips and have the opposite ends thereof interconnected through the medium of bolts or studs 7 In this in stance, the upper ends of the strips 01' plates are offset laterally as at S and mounted in the free extremities of the offsets or extensions is a pivot pin 9 having pivoted thereto one end of an arm 10. Secured in any suitable manner to the other end of the arm is a segmental rack 11 meshing with a pinion 12 keyed to the arbor 4 between the plates 5 and 6.

A bridging finger 13 is fastened between its ends to the projected end of the arbor i, that is the end beyond the cover 2, and one extremity of this bridging finger is adapted to engage a contact 14: secured to the cover 2 and connected to a binding post 15 adapted to be connected to one terminal of a circuit, while the opposite end of such finger is connected to one extremity of a fusible strip 16, the opposite end of the latter being fastened as at 17 to the cover of the casing. Fastened at one end to the arm 10 and normally acting to swing the arm and impart rotary movement to the arbor through the medium of the rack 11 and pinion 12 to engage the bridging finger with the contact 14, is a contractile spring or the like tension device 18 having the free extremity thereof fastened to the side wall of the casing as at 19. Secured to one of the plates of the frame, as the plate 5, is a binding post 20 adapted to form the other terminal of a circuit. Thus, it will be seen that the bridging finger 13 will be held out of engagement with the contact 14 and against the action of the spring 18 as long as the fusible strip 16 remains intact. Should the strip, however, melt under the action of the heat, the bridging finger 13 will be released and the spring 18 act to swing the arm 10 about the pivot pin 9 and so rotate the arbor 4 with the effect that the finger will engage the contact 14, thus completing the circuit by way of the arbor 4 and the frame composed of the plates 5 and 6, to the binding post 20. In order to limit the movement of the arm 10 and the rack 11 under the action of the spring 18 so. that the rack will not leave the pinion when in fluenced by the spring, any suitable means may be utilized. In the present instance, I employ a lug 21 formed integral with one end of the rack 11 and abutting the adjacent tooth on the pinion 12 when the rack has been actuated by the spring, as previously described.

Vhile I have herein shown and described one preferred form of my invention by way of illustration, I desire to hate it understood that I do not limit or confine myself to the precise details of construction herein described and delineated, as modification and variation may be made within the scope of the claim and without departing from the spirit of the invention.

I claim:

In combination a cylindrical case a shaft extending transversely and centrally therein, a cover engaging said case and forming a support for one end of said shaft, a pinion fixed upon said shaft, an arm through which said shaft passes, outwardly extending studs mounted upon said case and sup porting said arm, said shaft projecting through said cover, an angular offset formed at one end of said arm, a gearedsector engaging said pinion at one end, a stop shoulder formed upon said sector whereby to prevent movement of said gear in one direction, a deflected curvilinear arm formed upon said geared sector, a pivot mounted in said otl'set at its free end upon which is fulcrumed said deflected arm whereby said arm is disposed eccentric with respect to said pivot and said gear, a contractile spring secured to said case and secured to said deflected arm, a lever disposed outside said case fulcrumed intermediate its ends upon said shaft, a binding post secured to said case, a binding post secured upon said cover, and a fusible link secured to said cover on the outside thereof, and connected to said lever whereby to hold said lever in spaced relation from said second named binding post and whereby said contractile spring is placed under tension when said shoulder engages said pinion.

In testimony whereof I aflix my signature in presence of two witnesses.

JOHN C. MOESSUER. Witnesses:

JOHN H. Monssnnn, R. MAYWOOD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

